Publish shard CC-MAIN-2026-08/00762
Browse files- README.md +9 -9
- data/CC-MAIN-2026-08/00762.parquet +3 -0
- stats.csv +1 -0
README.md
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Open Index is a large-scale web text dataset built from [Common Crawl](https://commoncrawl.org). Every page goes through a pipeline that extracts the main content from raw HTML, converts it to clean Markdown using [trafilatura](https://github.com/adbar/trafilatura), and packages the result into Parquet files with full WARC metadata preserved.
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The dataset currently includes crawl **CC-MAIN-2026-08** with **16,
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Open Index is released under the **Open Data Commons Attribution License (ODC-By) v1.0**, the same license used by Common Crawl.
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### Compression Ratios
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Numbers below are actual measurements summed across all
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| Stage |
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| Raw WARC (.warc.gz, downloaded) | ~
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| HTML extracted (uncompressed) | 2.0 TB | ~295 TB | — |
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| Packed markdown WARC (.md.warc.gz) | ~35.3 GB | ~3.7 TB | **-98.3%** vs HTML |
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| Final Parquet (Zstd level 19) | 23.9 GB | ~2.9 TB | **-32.4%** vs packed WARC |
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The big win is the HTML → Markdown step: trafilatura strips all tags, scripts, styles, navigation, and ads, keeping only the main content. This cuts 2.0 TB of uncompressed HTML down to 75.
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End to end: ~
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### Processing Times
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Pipeline timings across
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```
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Download (raw WARC) ████████████████████████ total
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Convert (HTML → MD) ██░░░░░░░░░░░░░░░░░░░░░░ total 4h 24m 57s avg 18s
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Export (Parquet) █████░░░░░░░░░░░░░░░░░░░ total 11h
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Publish (HuggingFace) ██░░░░░░░░░░░░░░░░░░░░░░ total 6h 16m 42s avg 26s
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```
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Open Index is a large-scale web text dataset built from [Common Crawl](https://commoncrawl.org). Every page goes through a pipeline that extracts the main content from raw HTML, converts it to clean Markdown using [trafilatura](https://github.com/adbar/trafilatura), and packages the result into Parquet files with full WARC metadata preserved.
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The dataset currently includes crawl **CC-MAIN-2026-08** with **16,679,902 documents across 862 shards**. We plan to add more snapshots over time.
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Open Index is released under the **Open Data Commons Attribution License (ODC-By) v1.0**, the same license used by Common Crawl.
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### Compression Ratios
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Numbers below are actual measurements summed across all 862 files of CC-MAIN-2026-08 (16,679,902 pages total), projected to the full crawl of 100,000 WARC files.
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| Stage | 862 files (measured) | 100,000 files (projected) | Reduction |
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| Raw WARC (.warc.gz, downloaded) | ~698.7 GB | ~83 TB | — |
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| HTML extracted (uncompressed) | 2.0 TB | ~295 TB | — |
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| Packed markdown WARC (.md.warc.gz) | ~35.3 GB | ~3.7 TB | **-98.3%** vs HTML |
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| Final Parquet (Zstd level 19) | 23.9 GB | ~2.9 TB | **-32.4%** vs packed WARC |
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The big win is the HTML → Markdown step: trafilatura strips all tags, scripts, styles, navigation, and ads, keeping only the main content. This cuts 2.0 TB of uncompressed HTML down to 75.2 GB of markdown — a **98.3% reduction** — before any file-level compression is applied. Parquet with Zstd level 19 then compresses the markdown a further 68.2%.
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End to end: ~698.7 GB of raw gzipped WARCs becomes **23.9 GB of Parquet** — a **96.6% total reduction** — containing 16,679,902 clean markdown documents.
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### Processing Times
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Pipeline timings across 862 shards of CC-MAIN-2026-08:
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```
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Download (raw WARC) ████████████████████████ total 51h 2m 5s avg 3m 33s
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Convert (HTML → MD) ██░░░░░░░░░░░░░░░░░░░░░░ total 4h 24m 57s avg 18s
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Export (Parquet) █████░░░░░░░░░░░░░░░░░░░ total 11h 33m 5s avg 48s
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Publish (HuggingFace) ██░░░░░░░░░░░░░░░░░░░░░░ total 6h 16m 42s avg 26s
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```
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data/CC-MAIN-2026-08/00762.parquet
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version https://git-lfs.github.com/spec/v1
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oid sha256:d4846be58f3002c4e603b0ebe4ecfa8a0fa903e687bfe07bde2d56cd08150158
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size 29688655
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stats.csv
CHANGED
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@@ -434,6 +434,7 @@ CC-MAIN-2026-08,758,19286,2540562630,92329615,30011805,2026-03-13T18:52:06Z,461,
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CC-MAIN-2026-08,759,19351,2589407934,89687505,28775957,2026-03-13T19:01:19Z,545,0,50,20
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CC-MAIN-2026-08,760,19406,2587293077,92215111,29920457,2026-03-13T19:09:41Z,427,0,71,13
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CC-MAIN-2026-08,761,19312,2565263834,92599487,29887045,2026-03-13T19:20:20Z,498,0,92,27
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CC-MAIN-2026-08,851,19575,2612873485,97000364,30911294,2026-03-13T06:41:39Z,163,0,37,204
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CC-MAIN-2026-08,852,19334,2546015208,94959847,30205044,2026-03-13T06:45:52Z,183,0,57,11
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CC-MAIN-2026-08,853,19694,2567973975,95901932,30303494,2026-03-13T06:50:12Z,150,0,28,80
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CC-MAIN-2026-08,759,19351,2589407934,89687505,28775957,2026-03-13T19:01:19Z,545,0,50,20
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CC-MAIN-2026-08,760,19406,2587293077,92215111,29920457,2026-03-13T19:09:41Z,427,0,71,13
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CC-MAIN-2026-08,761,19312,2565263834,92599487,29887045,2026-03-13T19:20:20Z,498,0,92,27
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CC-MAIN-2026-08,762,19474,2583445604,90349444,29688655,2026-03-13T19:27:15Z,395,0,72,0
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CC-MAIN-2026-08,851,19575,2612873485,97000364,30911294,2026-03-13T06:41:39Z,163,0,37,204
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CC-MAIN-2026-08,852,19334,2546015208,94959847,30205044,2026-03-13T06:45:52Z,183,0,57,11
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CC-MAIN-2026-08,853,19694,2567973975,95901932,30303494,2026-03-13T06:50:12Z,150,0,28,80
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